During his impromptu appearance, which came after Ariana sung 'Break Free', Justin - who is married to Hailey Bieber - told the California crowd: "I haven't been on stage in like two years. I came out here, no idea I was gonna be on stage tonight.

"I wore this fly outfit not knowing I was gonna be on stage. I had to get my groove back, get my swag back."

The 'Love Yourself' singer - who shares manager Scooter Braun with the 'No Tears Left to Cry' hitmaker - then said: "Thank you Coachella, thank you to Ariana Grande. She's so amazing by the way, she's so awesome."

If that wasn't enough, Justin then teased that his new album - his first since 2015's 'Purpose' - is "coming soon".

THIS JUST CLARIFIED THAT THE SUMMER BANGERS THAT JUSTIN BIEBER IS ABOUT TO RELEASE ARE THE LEAD SINGLES FROM HIS NEXT STUDIO ALBUM. HE NOT ONLY HAS A WHOLE ALBUM READY BUT IS FEELING GOOD WITHIN HIMSELF TO DROP IT & BE BACK TO THE MUSIC SCENE, HALLELUJAH pic.twitter.com/22cZ5NcxJL

Justin - who recently made his music return on Lil Dicky's song 'Earth' with Ariana, and the likes of Ed Sheeran, DJ Khaled, Katy Perry, Halsey, Shawn Mendes and Adam Levine - told fans in March that he wouldn't be rushing his return to music because he wanted to take the time to make something he could be proud of.